Amazon Underground has tripled its lineup of free Android apps since launch

In late August, Amazon replaced its free App of the Day program with its Amazon Underground app, which offered access to over $10,000 worth of Android apps and in-app content for free. Now the company has announced that the amount of apps and in-app purchase available from Amazon Underground has tripled since its launch.

Amazon helps support developers with apps in Amazon Underground with a system that pays them for every minute a customer uses their app or game. So far, this method seems to be successful for many development teams:

"We've been thrilled with the performance of Jetpack Joyride and Fruit Ninja as part of the Amazon Underground program in the month since launch," said Shainiel Deo, CEO of Halfbrick Studios. "Thus far we have doubled the downloads and revenue from our apps in the Amazon Appstore and most interestingly, customers are engaging with our in-app purchase content within our games at an extremely high rate. Since all in-app purchases are free in Amazon Underground, they can play the games in new and exciting ways."

Just a reminder: If you are an Android device owner, you can go to Amazon's Underground site from your browser, enter your phone number or email address and hit send to start the process. This will send a link to your phone that will allow you to download the app. If you navigate to the site from your phone, you will be able to click the download link without entering the information. You will need to enable the ability to install apps from Unknown Sources in your phone's settings